CN104439098A - Manufacture process of crushing machine hammer heads - Google Patents
Manufacture process of crushing machine hammer heads Download PDFInfo
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- CN104439098A CN104439098A CN201410726879.8A CN201410726879A CN104439098A CN 104439098 A CN104439098 A CN 104439098A CN 201410726879 A CN201410726879 A CN 201410726879A CN 104439098 A CN104439098 A CN 104439098A
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- model
- alloy
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- sand
- alloy solution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
Abstract
The invention discloses a manufacture process of crushing machine hammer heads. The manufacture process of the crushing machine hammer heads comprises the following steps: processing and forming a plurality of holes in the periphery of a prefabricated foam macromolecule material model; immersing the model with the holes into an alloy solution; putting the model immersed by the alloy solution into a sand box; and casting and molding a sand filling model by using a high manganese steel metal solution under the negative-pressure environment. Compared with the prior art, the high manganese steel metal chemically reacts with the metal of an alloy layer when the high manganese steel metal solution is used for casting, so that the hardness and abrasion resistance of working parts of hammer heads can be improved, and thus the product yield can be increased.
Description
Technical field
The present invention relates to machinery manufacturing technology field, more specifically, relate to a kind of crusher hammer head manufacturing technique.
Background technology
Hammer mill is a kind of apparatus that the material of 600-1800 millimeter is crushed to less than 25 or 25 millimeters by granularity, is applicable to the medium-hard material in the fields such as broken cement, chemical industry, electric power, metallurgy.During hammer mill broken material, the material mainly utilizing the tup of High Rotation Speed and eminence to fall clashes into mutually, thus material is broken, and as can be seen here, tup is the main broken instrument of hammer mill.
Because tup is in the process of broken material, High Rotation Speed hit material, be not only subject to very high shock loading, but also be subject to serious cutter cut formula wearing and tearing, therefore, require that tup should possess enough anti-impact forces and excellent wearability.And the tup of traditional hammer mill adopts potassium steel cast to be formed, the tup sclerosis aspect of this kind of material is more shallow, and initial hardness is lower, is easy to cause the initial abrasion of tup work part larger, and then causing product discharge rate to decline, quality of material does not reach requirement.
Summary of the invention
In view of this, embodiments provide a kind of crusher hammer head manufacturing technique, by tup working portion alloying, thus hardness and the wearability of tup working portion can be increased, and then product discharge rate can be improved.
Embodiments provide a kind of crusher hammer head manufacturing technique, comprising: around prefabricated foam polymer material model, be processed to form several holes; The described pore model that is provided with is immersed in alloy solution, forms alloy-layer at described model skin; The described model soaking alloy solution is placed in sandbox, carries out back-up sand and consolidation operation; Under subnormal ambient, use potassium steel molten metal to complete the model cast molding of back-up sand.
Preferably, use under subnormal ambient potassium steel molten metal by complete back-up sand model cast molding after, also comprise: the product of described cast molding is warming up to 1080 DEG C according to heat treatment cycle curve; Be incubated 3 ~ 4 hours; Insert in the water of 25 DEG C and carry out water-tenacity treatment.
Preferably, arranging before porose model is immersed in alloy solution by described, also comprise: form alloy solution by including the alloyed powder of high-carbon chromium iron, flux and binding agent by default proportioning.
Preferably, alloyed powder specifically high-carbon chromium iron, ferro-boron powder and the rare earth alloy of high-carbon chromium iron or high-carbon chromium iron, tungsten carbide powder and rare earth alloy is included, or high-carbon chromium iron, carbonized titanium powder and rare earth alloy described in; Described flux is sodium carbonate and borax; Described binding agent is polyvinyl alcohol water liquid.
Preferably, describedly around prefabricated foam polymer material model, be processed to form some holes, comprise: the model described foam polymer material material being formed tup working portion with shrinkage rates 1:1.03 compacting; Toast described model, make the water content of described model be not more than 3%; Around described model, be processed to form the large * hole depth in some holes is the hole of 2mm*40mm.
Preferably, after described model is immersed in alloy solution, is carrying out back-up sand and before consolidation operation, also comprising: toast the described model soaking alloy solution; Exotic material is smeared at the described model surface soaking alloy solution of drying; Dry described exotic material, make the water content of described exotic material be not more than 1%.
Preferably, the thickness of described exotic material is 2 ~ 4mm.
Preferably, the material of described potassium steel molten metal is Mn13-1 or Mn17Cr2.
From above technical scheme, the crusher hammer head manufacturing technique that the embodiment of the present invention provides, first, several holes are processed to form around prefabricated foam polymer material model, then, form alloy-layer at model skin, after carrying out back-up sand step, under subnormal ambient, use the cast molding of potassium steel molten metal.Due to when using the casting of potassium steel molten metal, the metal generation chemical reaction of potassium steel Metal and Alloy layer, thus tup working portion hardness and wearability can be increased, and then product discharge rate can be improved.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.Shown in accompanying drawing, above-mentioned and other object of the present invention, Characteristics and advantages will be more clear.Reference numeral identical in whole accompanying drawing indicates identical part.Deliberately do not draw accompanying drawing by actual size equal proportion convergent-divergent, focus on purport of the present invention is shown.
The process chart of the crusher hammer head manufacturing technique that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the grinder hammerhead of Fig. 2 manufactured by the manufacturing process according to the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, carry out clear, complete description to the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The material of existing hammer head of hammer crusher is the high manganese steel materials such as Mn13-1 or Mn17cr2, the tup of this kind of material is at the non-thump abrasive material of processing, when being especially mingled with a large amount of silt or moisture in abrasive material, very serious to the wearing and tearing of tup working portion, thus cause product yield ratio low.Based on this, embodiments provide a kind of crusher hammer head manufacturing technique, the tup of high rigidity, high-wearing feature can be produced.
Refer to Fig. 1, the process chart of the crusher hammer head manufacturing technique that Fig. 1 provides for the embodiment of the present invention, described manufacturing process comprises:
Step S101: be processed to form several holes around prefabricated foam polymer material model.
Wherein, because the working portion of hammer mill mainly through tup is pulverized material, therefore, hardness and the wearability of tup working portion can only be improved.In the present embodiment, the casting pattern of foam polymer material as tup working portion can be chosen, and using this casting pattern as the casting of tup working portion basis.Concrete, first use particular manufacturing craft that foam polymer material is compressing, then compressing material is dried.In order in follow-up casting process, the infiltration model enabling alloy solution even, deep, in the present embodiment, forms multiple hole by the Surface Machining of model.In a preferred embodiment of the invention, the large * hole depth in the hole in hole is 2mm*40mm.
Wherein, the foam polymer material in the present embodiment can be expandable polystyrene resin, expandability methymethacrylate and styrene copolymerized resin or expandability polymethyl methacrylate etc.In a preferred exemplary of the present invention, the expandable polystyrene resin that uses, in process, shrinkage rates can be 1:1.03, during oven dry, makes the water content of model be not more than 3%.
Certainly, above are only preferred exemplary of the present invention, do not constitute any limitation technical scheme of the present invention, the material used in technical solution of the present invention and the parameter adding man-hour also can be other.
Step S102: be immersed in arranging porose model in alloy solution.
Wherein, after making the model of tup working portion, make the alloy component of tup working portion, with the alloying by tup working portion.Concrete, alloy solution can be formed including the alloyed powder of high-carbon chromium iron, flux and binding agent by default proportioning, then surface being arranged porose model and being immersed in alloy solution, making alloy material saturated model, forming alloy-layer.
It may be noted that, include alloyed powder specifically high-carbon chromium iron, ferro-boron powder and the rare earth alloy of high-carbon chromium iron, or high-carbon chromium iron, tungsten carbide powder and rare earth alloy, or high-carbon chromium iron, carbonized titanium powder and rare earth alloy; Flux is sodium carbonate and borax; Binding agent is polyvinyl alcohol water liquid.When the material contained by alloyed powder is different, alloyed powder is not identical with the proportioning of binding agent with flux yet, in a preferred embodiment of the invention, the material of alloyed powder comprises high-carbon chromium powder, ferro-boron powder, rare earth alloy, wherein, the proportioning of high-carbon chromium powder, ferro-boron powder, rare earth alloy, flux, binding agent is 1:0.22:0.05:0.04:0.06.
Step S103: be placed in sandbox by the model soaking alloy solution, carries out back-up sand and consolidation operation.
Wherein, in above step, by the inner alloy of alloy tup working portion, next step has needed that the model being mixed with alloy material is carried out burying type and has fixed.Burying in the fixing process of type, need to use metal to be displaced by foam polymer material under the high temperature conditions, this process model is inevitably subject to a certain size impact force action, thus model may produce compression and flexural deformation, and then affects the final size precision of tup working portion.
In order to solve the problem, need the rigidity improving model, therefore, the model soaking alloy solution is put into sandbox, back-up sand is carried out to model, and by the mode consolidation of vibrations, intensity and the rigidity of model can not only be improved like this, and provide space for metal and foam polymer material are replaced.
Wherein, the material of back-up sand can be quartz sand, and the particle mean size of sand grains can be AFS25 ~ 45.
Step S104: use potassium steel molten metal to complete the model cast molding of back-up sand under subnormal ambient.
Wherein, seen from the above description, back-up sand can provide space for the displacement of metal and foam polymer material, model is infiltrated in the space that liquid metal is provided by back-up sand under suction function, because the temperature of molten metal is higher, foam polymer material is decomposition gasification under high temperature action, and discharges from space, and the space occupied by foam polymer material is occupied by metal liquid, foam polymer material is replaced by final metal.In addition, liquid metals, in the process of replacing with foam polymer material, carries out chemical reaction with alloying element and forms high hardness material, thus improves the hardness of tup working portion.
But when liquid metal and foam polymer material are replaced, need the integrality keeping model, meanwhile, liquid metal is easy to be combined with sand grains form mechanical sand, thus produces defect.In order to head it off, before back-up sand, be also included in the model surface soaking alloy solution and smear exotic material, and exotic material oven dry is not more than 1% to water content.Now, exotic material forms crust layer, can not only support and protection model, forms the complete of die cavity after keeping foam polymer material volatilization, and can prevent liquid metal from infiltrating sand and scab, absorbs catabolite and allows decomposition gas pass through coating.
Wherein, in the present embodiment, the material of liquid metal liquid can be Mn13-1 or Mn17Cr2; Exotic material can be zirconium English powder, silica flour, aluminium oxide or graphite powder, and the present invention does not limit this.
It may be noted that, while model casting liquid metal, whole tup and hammer handle are completed casting, forms hammer body as shown in Figure 2.Wherein, 1 is whole tup, and 11 is the working portion of tup, and 2 is hammer handle.
In addition, after hammer body has been cast, also needed to heat-treat hammer body, so that hammer body is carried out Metamorphism treatment, ferrite has been become austenite.Concrete, comprising: the model of described cast molding is warming up to 1080 DEG C according to heat treatment cycle curve, be incubated after 3 ~ 4 hours, insert in the water of 25 DEG C and carry out water-tenacity treatment, complete Metamorphism treatment.
In sum, the crusher hammer head manufacturing technique that the embodiment of the present invention provides, first, several holes are processed to form around prefabricated foam polymer material model, then, form alloy-layer at model skin, after carrying out back-up sand step, under subnormal ambient, use the cast molding of potassium steel molten metal.Due to when using the casting of potassium steel molten metal, the metal generation chemical reaction of potassium steel Metal and Alloy layer, thus tup working portion hardness and wearability can be increased, and then product discharge rate can be improved.
The above is only the specific embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. crusher hammer head manufacturing technique, is characterized in that, comprising:
Several holes are processed to form around prefabricated foam polymer material model;
The described pore model that is provided with is immersed in alloy solution, forms alloy-layer at described model skin;
The described model soaking alloy solution is placed in sandbox, carries out back-up sand and consolidation operation;
Under subnormal ambient, use potassium steel molten metal to complete the model cast molding of back-up sand.
2. technique as claimed in claim 1, is characterized in that, use under subnormal ambient potassium steel molten metal by complete back-up sand model cast molding after, also comprise:
The model of described cast molding is warming up to 1080 DEG C according to heat treatment cycle curve;
Be incubated 3 ~ 4 hours;
Insert in the water of 25 DEG C and carry out water-tenacity treatment.
3. technique as claimed in claim 1, is characterized in that, arranging before porose model is immersed in alloy solution by described, also comprises:
Alloy solution is formed by default proportioning by including the alloyed powder of high-carbon chromium iron, flux and binding agent.
4. technique as claimed in claim 3, it is characterized in that, described alloyed powder specifically high-carbon chromium iron, ferro-boron powder and the rare earth alloy including high-carbon chromium iron, or high-carbon chromium iron, tungsten carbide powder and rare earth alloy, or high-carbon chromium iron, carbonized titanium powder and rare earth alloy; Described flux is sodium carbonate and borax; Described binding agent is polyvinyl alcohol water liquid.
5. technique as claimed in claim 1, is characterized in that, describedly around prefabricated foam polymer material model, is processed to form some holes, comprising:
Described foam polymer material material is formed the model of tup working portion with shrinkage rates 1:1.03 compacting;
Toast described model, make the water content of described model be not more than 3%;
Around described model, be processed to form the large * hole depth in some holes is the hole of 2mm*40mm.
6. technique as claimed in claim 1, is characterized in that, after being immersed in alloy solution by described model, carrying out back-up sand and before consolidation operation, is also comprising:
Toast the described model soaking alloy solution;
Exotic material is smeared at the described model surface soaking alloy solution of drying;
Dry described exotic material, make the water content of described exotic material be not more than 1%.
7. technique as claimed in claim 6, it is characterized in that, the thickness of described exotic material is 2 ~ 4mm.
8. technique as claimed in claim 1, it is characterized in that, the material of described potassium steel molten metal is Mn13-1 or Mn17Cr2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410726879.8A CN104439098A (en) | 2014-12-04 | 2014-12-04 | Manufacture process of crushing machine hammer heads |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410726879.8A CN104439098A (en) | 2014-12-04 | 2014-12-04 | Manufacture process of crushing machine hammer heads |
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| CN104439098A true CN104439098A (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410726879.8A Pending CN104439098A (en) | 2014-12-04 | 2014-12-04 | Manufacture process of crushing machine hammer heads |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110923492A (en) * | 2019-12-27 | 2020-03-27 | 重庆市科学技术研究院 | Preparation method of hard alloy and composite wear-resistant hammer for sand making |
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| US2836867A (en) * | 1950-12-04 | 1958-06-03 | Morris Bean & Company | Process of making mold |
| JPS59197371A (en) * | 1983-04-25 | 1984-11-08 | Riken Corp | Production of casting having wear-resistant surface layer |
| CN1748912A (en) * | 2005-10-13 | 2006-03-22 | 西安交通大学 | Composite material tup and its casting method |
| CN102423799A (en) * | 2011-12-12 | 2012-04-25 | 广东新劲刚超硬材料有限公司 | Method of in situ synthetic steel bond hard alloy casting composite hammerhead and hammerhead |
| CN103752764A (en) * | 2013-12-13 | 2014-04-30 | 柳州市柳港激光科技有限公司 | Composite shovel having wear resistance metal and ceramic hybrid surface layer |
-
2014
- 2014-12-04 CN CN201410726879.8A patent/CN104439098A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2836867A (en) * | 1950-12-04 | 1958-06-03 | Morris Bean & Company | Process of making mold |
| JPS59197371A (en) * | 1983-04-25 | 1984-11-08 | Riken Corp | Production of casting having wear-resistant surface layer |
| CN1748912A (en) * | 2005-10-13 | 2006-03-22 | 西安交通大学 | Composite material tup and its casting method |
| CN102423799A (en) * | 2011-12-12 | 2012-04-25 | 广东新劲刚超硬材料有限公司 | Method of in situ synthetic steel bond hard alloy casting composite hammerhead and hammerhead |
| CN103752764A (en) * | 2013-12-13 | 2014-04-30 | 柳州市柳港激光科技有限公司 | Composite shovel having wear resistance metal and ceramic hybrid surface layer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110923492A (en) * | 2019-12-27 | 2020-03-27 | 重庆市科学技术研究院 | Preparation method of hard alloy and composite wear-resistant hammer for sand making |
| CN110923492B (en) * | 2019-12-27 | 2021-03-23 | 重庆市科学技术研究院 | Preparation method of hard alloy and composite wear-resistant hammer for sand making |
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Application publication date: 20150325 |